void processFrame() {
  startNewFrame(uartPixelFormat);

  camera.waitForVsync();

  for (uint16_t y = 0; y < lineCount; y++) {
    lineBufferIndex = 0;
    uint8_t sendWhileReadCounter = 0;

    lineBuffer[0] = 0; // first byte from Camera is half a pixel

    for (uint16_t x = 1; x < lineLength * 2 + 1; x++) {
      // start sending first bytes while reading pixels from camera
      if (uartSendWhileReadingCount > 0) {
        if (sendWhileReadCounter) {
          sendWhileReadCounter--;
        } else {
          sendNextPixelByte();
          sendWhileReadCounter = uartSendWhileReadingCount;
        }
      }
      camera.waitForPixelClockRisingEdge();
      camera.readPixelByte(lineBuffer[x]);
    }

    while (lineBufferIndex < lineLength * 2) {
      sendNextPixelByte();
    }
  }
}